package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.dishMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private dishMapper dishMapper1;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增套餐操作,多表操作
     * @param setmealDTO
     */
    @Transactional    //要么同时失败要么同时成功
    @Override
    public void add(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);  //属性拷贝

        setmeal.setStatus(0);

        setmealMapper.insert(setmeal);
        //获取套餐的主键值
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 删除套餐操作
     * @param ids
     */
    @Override
    public void deleteById(List<Long> ids) {
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        for (Long id : ids) {
            setmealMapper.deleteById(id);
            setmealDishMapper.deleteBySetmealId(id);
        }
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 更新套餐信息
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        //获取更新套餐的主键值
        Long setmealId=setmeal.getId();

        //删除原有的旧关系
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmealId);
        }
        //重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 设置套餐的状态
     * @param status
     * @param id
     */
    @Override
    public void setStatus(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList=dishMapper1.getBySetmealId(id);
            if (dishList!=null&&dishList.size()>0){
                for (Dish dish : dishList) {
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
